package lesson4;

import java.util.Properties;

public class Demo1 {
    public static void main(String[] args) {
        //System system = new System();
        //ArrayUtils arrayUtils = new ArrayUtils();
        long beginTime = System.currentTimeMillis();
        //插入代码
        for(int i = 1; i<= 1000*1000*10000; i++){

        }
        long endTime = System.currentTimeMillis();
        System.out.println("代码执行时间为:"+(endTime-beginTime)+"ms");
        Properties properties = System.getProperties();

        String str = System.getProperty("os.name");
        System.out.println("----------");
    }
}
